.TH "PAPI_unregister_thread" 3 "Thu Dec 14 2023" "Version 7.1.0.0" "PAPI" \" -*- nroff -*-
.ad l
.nh
.SH NAME
PAPI_unregister_thread \- Notify PAPI that a thread has 'disappeared'\&.  

.SH SYNOPSIS
.br
.PP
.SH "Detailed Description"
.PP 

.PP
\fBReturn values\fP
.RS 4
\fIPAPI_ENOMEM\fP Space could not be allocated to store the new thread information\&. 
.br
\fIPAPI_ESYS\fP A system or C library call failed inside PAPI, see the errno variable\&. 
.br
\fIPAPI_ECMP\fP Hardware counters for this thread could not be initialized\&.
.RE
.PP
\fBPAPI_unregister_thread\fP should be called when the user wants to shutdown a particular thread and free the associated thread ID\&. THIS IS IMPORTANT IF YOUR THREAD LIBRARY REUSES THE SAME THREAD ID FOR A NEW KERNEL LWP\&. OpenMP does this\&. OpenMP parallel regions, if separated by a call to omp_set_num_threads() will often kill off the underlying kernel LWPs and then start new ones for the next region\&. However, omp_get_thread_id() does not reflect this, as the thread IDs for the new LWPs will be the same as the old LWPs\&. PAPI needs to know that the underlying LWP has changed so it can set up the counters for that new thread\&. This is accomplished by calling this function\&. 

.SH "Author"
.PP 
Generated automatically by Doxygen for PAPI from the source code\&.
